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Time of flight measurements with the PH32 chip

Type of document
článek v časopise
article
Peer-reviewed
publishedVersion
Author
Janoška Z.
Benka T.
Havránek M.
Hejtmánek M.
Jakovenko J.
Kafka V.
Kaschner M.
Marčišovská M.
Marčišovský M.
Neue G.
Tomášek L.
Švihra P.
Vančura P.
Vrba V.
Rights
restrictedAccess
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Abstract
The front-end readout chip PH32, that is suitable for the measurement of {X-rays}, beta radiation and ions, is primarily dedicated to the dose rate measurement and basic spectroscopy. This article is focused on the Time-of-Flight (ToF) functionality used in particle tracking or ion mass spectroscopy. The PH32 chip was manufactured using a commercial 180 nm CMOS process and contains various possibilities for ToF measurements including Time-of-Arrival (ToA) counter in each individual measurement channel, a global ToA counter controlled by internal trigger logic and a trigger output with a proprietary differential signaling driver. Along with the energy measurement using the Time-over-Threshold (ToT) method, the time-walk effect of ToF may be corrected. The chip is optimized for the strip sensor capacitance of 8 pF with AC coupling and the electronic noise is established at 1100 e−. The measurements presented in this paper are focused on channel response to an injected charge including a measurement of the channel dispersion and the time-walk effect caused by the varying of the injected charge together with the results provided by the global ToA counter and the trigger output. A discussion of the ToF measurements made using a laser light source is presented for the individual channel counter and the global ToA counter including the time-walk effect correction.
URI
http://hdl.handle.net/10467/87108
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